Stasis Cell

Most auras that freeze a creature are permanent commitments: they pin one threat and stay there, so a single bounce spell or sacrifice outlet undoes the whole investment. The fix this one carries is built into its own text. The activated ability lets the enchantment walk: once it resolves, you are no longer married to the first target, and for you can move it to whatever becomes the most dangerous creature on the other side, or shift it off a creature about to eat a removal spell so the lock survives. Because that ability has no timing restriction, it works at instant speed; the relocation can happen on an opponent's turn, in response to an attack declaration or a flicker, which is what separates a repositionable lock from a static one. The effect itself is restrained: it does not tap the creature down, it only denies the untap step, so a creature that is already untapped keeps blocking until it taps to attack and then stays tapped. The price pays for the flexibility. Five mana to deploy and four more for every relocation keeps the card from competing with cheaper removal that simply kills the thing. What the design answers is the old fragility of permanent disablers like Pacifism or Paralyze, which blank the moment their one target leaves the battlefield. By letting the aura chase, it trades raw efficiency for relevance across a long game.